42 ENTOMOLOGICAL NEWS. [February, 



furnished at the tip with a distinct claw, which is an unusual 

 character in this series, and they lack entirely the epiphysis, which 

 is an all but universal character in the Macroheterocera, and this 

 serves to isolate the family from all the other related Bombyces 

 examined by me. There are other differences, in thoracic struc- 

 ture and elsewhere, which this is scarcely the place to describe, 

 but enough has been shown to make it desirable that Mr. Dyar's 

 sentence on p. 35 of this volume: " The genera Pseudohazis and 

 Hemileuca undoubtedly belong to the Saturniidae, " should be 

 regarded as an expression of opinion and not as a statement of 

 fact. The use of the term ' ' undoubtedly' ' is unfortunate in any 

 case, for we really know too little absolutely to make any such 

 definite assertions. I am aware that it would not be difficult to find 

 equally positive assertions made by myself in times past, when I 

 thought I knew very much more than I do now; at that time no 

 one else seems to have had any definite information concerning 

 the wealth of knowledge that we did not possess. It is certain 

 that I did not then realize that all that was printed in the books 

 could not be implicitly relied upon. 



Note. — Some unfortunate typograpical errors crept into the 

 January instalment of this paper; in one case entirely reversing 

 my intended statement. On p. 5, line 3, omit but between certain 

 and that ; line 16, after genus insert which ; line 25, lengthily 

 insert often. 



o 



NOTES ON THE ENTOMOLOGY OF COLORADO.-II. 



By T. D. A. CocKERELL, Kingston, Jamaica. 



DELTA. 

 The northern border of the countv is elevated, but rapidly de- 

 scending as one goes southward, the zones of vegetation recorded 

 on p. 202 are grassed, and the Gunnison River is reached at quite 

 a low level. I crossed the county in September and October, 

 from the Grand Mesa down the valley of Surface Creek and 

 across the plain to Montrose. We camped for a few days on 

 Surface Creek at about 8,500 feet altitude, where the zones of 

 Spruce and Quaking Asp intermingled. Here the plants were 

 characteristic of the mid-alpine region, such species as Fragaria 

 vesca, Epilobium angusti/olium, Urtica gracilis, Rubus strigosus 



